of ordinary aluminum foil and wrapping it around an exterior door handle or doorknob.
Depending on where you encounter the claim, the supposed benefits vary.
Some versions suggest the foil will:
Make the handle more difficult to grip
Make a crinkling noise if someone touches it
Reveal that someone has handled the door
Make an intruder hesitate
Provide a cheap warning system while you’re sleeping
The appeal is obvious. Aluminum foil is inexpensive, widely available, and takes only a few seconds to use.
But simplicity doesn’t automatically make something effective.
